Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual torneio do Canadá aconteceu em 1998?
 ###Tabelas: CREATE TABLE rank_by_time_in_office (rank_by_time_in_office_id AUTO_INCREMENT PRIMARY KEY, Rank: INT, Prime Minister: VARCHAR, Party: VARCHAR, Assumed Office: VARCHAR, Left Office: VARCHAR, TOTAL Time in Office: VARCHAR) CREATE TABLE round_6 (round_6_id AUTO_INCREMENT PRIMARY KEY, Home team VARCHAR, Home team score VARCHAR, Away team VARCHAR, Away team score VARCHAR, Venue VARCHAR, Crowd INT, Date VARCHAR) CREATE TABLE doubles_performance_timeline (doubles_performance_timeline_id AUTO_INCREMENT PRIMARY KEY, Tournament VARCHAR, 1987 VARCHAR, 1988 VARCHAR, 1989 VARCHAR, 1990 VARCHAR, 1991 VARCHAR, 1992 VARCHAR, 1993 VARCHAR, 1994 VARCHAR, 1995 VARCHAR, 1996 VARCHAR, 1997 VARCHAR, 1998 VARCHAR, 1999 VARCHAR, 2000 VARCHAR, 2001 VARCHAR, 2002 VARCHAR, 2003 VARCHAR, 2004 VARCHAR, 2005 VARCHAR) CREATE TABLE canadian_open (canadian_open_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Men's singles VARCHAR, Women's singles VARCHAR, Men's doubles VARCHAR, Women's doubles VARCHAR, Mixed doubles VARCHAR) CREATE TABLE current_team (current_team_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Current singles ranking VARCHAR, Current doubles ranking VARCHAR, First year played INT, Ties played INT, Total W–L VARCHAR, Singles W–L VARCHAR, Doubles W–L VARCHAR)  
SELECT 1998 FROM doubles_performance_timeline WHERE Tournament = canada